Bolt for doors



(Model.)

A. G. THOMPSON.

' BOLT FOR DOORS.

No. 271,001. Patented J'adn.23, 1883.

AMNQ

UNITED STATES PATENT OFFICE.

ALBERT Gr. THOMPSON, OF MYSTIC RIVER, CONNECTICUT.

BOLT FOR DOORS.

SPECIFICATION forming part of Letters Patent No. 271,001, dated January 23, 1883.

' Application filed September 25, 1882. (Model.)

tional view on the line 3 3 Corresponding parts in the several figures are denoted by like letters of reference.

This invention relates to an improved burglar-proof bolt for doors, &c., the construction and operation of which will be hereinafter more fully described, and particularly pointed out in the claim.

In the drawings hereto annexed, A represents the bolt, which slides in the shell B, which latter is cast with lugs C for attachment to the door D.

E is a back or bottom plate titted in the shell or casing A, and having a lug or stud, F, projecting forwardly into a groove, G, in the rear ily understood.

secured in any position to which it may be adjusted.

L is the receiving shell or cap, which is cast or formed with lugs M, by which it is attached to the door-post N. A back or bottom plate, 0, suitably secured to the cap L, has a springcatch, P, the handle of which, Q, projects through anotch in the end of cap L, and which is provided with a tooth, R, adapted to engage a notch, S, in the under side of the front end of bolt A.

The operation of my invention will be read- W'hen the bolt A is pushed out it engages the spring-catch P, by which it is held in a locked position, preventing it from being picked or opened from the outside. It may,in addition, be'made fast by tightening the set screw handle I.

I claim and desire to secure by Letters Patent of the United States- The combination of the casing B, bolt A, having spring H, adapted to force it back into said casing, and provided with a notch, S, the setscrew I, forming a handle for said bolt, and the receiving-cap L, having spring-catch I, provided with projecting handle Q, and tooth R, as and for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereto aftixed my signature in presence of two witnesses.

ALBERT GAINS THOMPSON.

Witnesses:

. ERASTUS WM. DENrsoN,

FRANK W. BATIY. 

